1.Wavelength - the length of one cycle in a wave. Changing the wavelength changes the pitch.

2. Amplitude - the height of a wave. Change the amplitude changes the volume.

3. Frequency- how many cycles/second. The unit of measurement is
Hz. To determine the frequency of a wave take the length of time for
one cycle, ie .002 seconds, and divide it by one cycle: 1/.002 = 500 Hz.
This means that there are 500 cycles per second.

4. Equal Loudness Principle: If the amplitude stays the same but we
change the frequency, low and really high frequencies sound quieter
than the mid-range frequencies. Our ears perceive the frequencies to be
different volumes even though the volume isn't changing. The louder
the frequencies are played at the more similar the volume will be on all
the frequencies.

8.
Temporary Threshold Shift (TTS)- when we are in loud environments our
ears protect themselves by temporarily shutting down, so we can't hear
as well. After a couple of hours or days hearing returns to normal,
unless the exposure was too long in which case hearing damage
becomes permeant.